Final answer:
A. Correlations often give researchers insights that lead to understanding because they indicate relationships between variables, but they do not imply causation which is best established through experiments.
Step-by-step explanation:
Even though they are not cause-and-effect relationships, correlations often provide researchers with insights that lead to understanding. A correlation indicates a relationship between two variables, wherein one variable changes as the other does. However, it does not imply that one variable causes changes in another, this can be best established through an experiment. In fact, a correlation might be due to an underlying third factor, known as a confounding variable, which can be the true cause affecting both variables in question.